Regenerative reversing-furnace.



I L. L. KNOX. REGENEBATIVE REVERSING FURNACE.

APPLICATION FILED MAE.10,1909.

938,246. 4 Patented Oct. 2 6, 1909. 2 SHEETSSHEET 1.

INVENTOR L. L. KNOX.

REGENERATIVE REVERSING FURNACE. APPLICATION FILED MAB..10,1909.

Patented Oct. 26, 1909.

2 SHEETS-SHEET 2.

' I L J 3,

, TH E E W N o I i N j i I L WWW 557a;

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UNITED *sTATEs PATENT oFFIoE."

LUTHER L. KNOX, OF IBEN AVlJN, PENNSYLVANIA, ASSIGNOR T KEYSTONE FURNACE CONSTRUCTION COMPANY, OF PITTSBUBG, PENNSYLVANIA, A CORPORATION I OF PENNSYLVANIA.

-'To all whom it may concern:

Be it known that I, LUTHER L. KNOX, of Ben Avon, Allegheny county, Pennsylvania, have invented a new and useful Regenerative Reversing-Furnace, of which the following is a -full,-clear, and exact description, reference being had to the accompanying drawings, forming part of this specification,

. in which Figure 1 is a sectional elevation of one end portion of a furnace embodying my invention; Fig. 2 is an end View of the same; Fig.

3 is an end' View of the gas port; and Fig. 4

is a view partly in end elevation and partly in vertical section of the air port.

My invention has relation to furnaces of the regenerative reversing type, and more particularly to the construction and arrangement of the gas and air ports; the object of the invention being to provide a construction and arrangement of these ports whereby the destructiveaction of the hot gases is reduced to a minimum, and whereby any portion or portions of the ports which may become burned out in service can be readily removed and replaced.

Thenature of my invention Will be best understood by reference to the accompanying drawings, in which I have shown the preferred embodiment thereof, which will now be described, it being premised, however, that various changes may be made in the details of construction and arrangement of the parts without departing from the spirit and scope of my invention as defined in. the appended claims.

Referring to these drawings, the numeral 2 designates the hearth of an open hearth furnace, which may be of any usual or suitable construction.

- 3 designates the air up-take, and 4 the gas up-take at one end of the furnace. It will be understood that a similar arrangement of up-takes and of the ports, to be hereinafter described, is, in practice, provided at each end of the furnace.

' 5 designates the regenerator connection for the air port, and 6 the regenerator connection REGENERATIVE REVERSING-FUBNACE.

, Specification of Letters Patent. Patented Oct, 26, 1909, Application filed. March 10, 1909. Serial N 0. 482,473.

this purpose. air up-take 3. is forked or branched as indicated at 8, the .two branches 8 being provided at the1r=upper ends with the seats or supports 9 for the air; box or chamber 10, which is transversely arched, as shown'in Fig. 2, and -wh1ch is connected with the furnace chambervby a- 11 and 13 is provided at its inner or dis-- charge end witha removable end p'ortion- 14 or 15. The'detachable end portion 14 of the gas port or twyer 13 is providedwith a surrounding water jacket. This water'jacket 1s preferably composed of an arched top section 16 having the skew-backs'17 whlch'support the refractory arch 18; the side mem bers 19 having the refractory lining 20, and the base portion 21 having the refractory lining 22. The arched top 16 and17 is, supported upon the side walls 19 'and20in the manner clearly shown in Fig. 3. The detachable end portion 15 of the air port or twyer 11 is of similar construction, and consists of the hollow top casting'23,'the side refractory linings 26. The top casting 16 and the base casting25 adjoin each other, as shown in Fig. 1, thereby forming a double watercooled protection at the discharge end por-I tions of the two ports or twyers, this being the point where thedestructive action is greatest. The end wall 27 of the furnace is provided with an opening to receive these detachable ends, which discharge directly into the furnace chamber.

The body portion of each of the ports or twyers 11.' and 13 consists of an outer shell or casting, consisting of an arched top portion 28 having skew backs 29 for the refr'ac tory top arch30; the side channels 31, .and the base portion 32, with the inner refrac tory lining'33. These outer shells .or castings are preferably made insections having bolting flanges 34 =,,assho wn in Fig. 1, so that i any section can be readily removed and 'ecasting .24 and the base casting 25, with the p shown in Fig. 1, any suitable number ofv placed. The detachable end ports 14 and 15,

before described, are detachably secured to the bolting flanges 34 of the end sections of the body portions. These body portions may, if desired, be protected by" the embedded cooling rings or boxes36, as also these rings or boxes being employed in each port or twyer. g

The arch 10, constituting the an box or chamber, is'bodily removable from the seats or supports 9. The gas box orchamber 12 is also bodily removable from 1ts su port, a coolingbox or ring 38 being prefera ly provided at the joints where this box is seated on the up-take 4.

The arch 10 is preferably constructed in a similar manner to the ports or twyers 11 and 13; that is to say, it has ametallic outer shell 39 with ,a refractory lining 40. The gas chamber or box 12 is. also constructed with an outer metallic shell, preferably formed in sections 41, as indicated in Fig. 1 with bolting flanges 42 and with a removable top portearing down the entire structure.

tion consisting of an outer shell or casting 43 having skew-backs 44 for carrying the top arch 45 ofrefractory material. The front or outer wall may be provided with a plurality of cooling boxes 46. to protect this Wall against the cutting action of the hot gases. The up-take 4 may also be constructed in sections with joints as indicated at 47 and 48, so that any section can be readily removed. The downward extensions of the uptakes are preferably provided with side openings, normally closed by doors 7 and through which,

if desired, the accumulated deposits may be removed upon the platform 7 as indicated in Fig. 2.

By reason of the arch form of the air box 10, the hot air and gases passing there- 'through have a curved path or sweep, thus obviating angles or corners in which their cutting action is increased. By the sectional construction described, any desired portion of the gas and air port structure can be readily taken out and replaced when necessary, being easily reached without the necessity of Inasmuch as the gas and air up-takes and the gas and 'air ports are constructed separately from each other, and from the body of the furnace, they are not only more readily accessible, butare also surrounded by air so air cooling elfect is ata maximum. Any suitable arrangement of water-circulating pipes may be connected to the hollow coollng boxes or sections in the manner well understood in the 'art. Y

It will be obvious that various changes maybe made in the details of constructlon and arrangement of the parts. Thus, the gas and air ports or twyers may be made in any number of sections, the exact manner of building up and supporting the same may be varied, and various other changes may be made.

. I cla1m:

1. In a regenerative reversing furnace, an'

air up-take constructed separately from the body of the furnace, and forked or branched at its upper portion, and an air box or chamber of transversely arched form supported on the branched end of the uptake, and having a port or twyer leading to the furnace; substantially as described. I

2. In a regenerative reversing furnace, an air up-take constructed separately from the body of the furnace, and forked or branched at its upper portion, and an air box or chamber of transversely arched form supported on the branched endof the uptake and'having a port or twyer leading to the furnace, said port or twyer havinga detachable end portion; substantially as described. 3. In a regenerative reversing furnace, an air up-take constructed separately from the body of the furnace, and forked or branched at its upper portion, and an air box or chamber of transversely arched form supported on the branched end of the up-take andhaving a port or twyer leading to the furnace, said port or twyer having a watercooled end portion; substantially as described. s

4. In a regenerative reversing furnace, an air up-take constructed separately from the body of the furnace, and forked or branched at its. upper portion, and an air box or chamber of transversely arched form supported on the branched end of the up-t-ake and having a port or twyer leading to the furnace, said ortv or twyer being formed in a plurality o detachable sections; substantially as described.

5. In a regenerative reversing furnace, an air up-take constructed separately from the body of the furnace, and forked or branched at 1ts upper portion, and an air box or chamber of transversely arched form supported on the branched end of the up-take and havin a port or twyer leading to the furnace, sald Port or twyer being formed in a plurality o detachable sections, and also having water-cooling means; substantially as described.

6. In a regenerative reversing furnace, an air up-take branched or forked at its upper end portion, a transversely arched air box supported thereby, a separately constructed gas up-take, and a gas port connecting said up-take with the furnace and extending necting said up'takes with the furnace chamber, each of said ports being formed in a plurality of sectlons; substantlally as described.

8. A regenerative reversing furnace having separately constructed gas and air up-- takes, and separately constructed ports connecting said up-takes with the furnace chamber, each of said ports being formed m a plurality of sections and having watercooling means; substantially as described.

9. In a regenerative reversmg furnace, a gas uptake, and a gas box or chamber removably supported on the upper end of the uptake, said box or chamber aving a port leading to the furnace chamber, and also having a removable top or cover; substantially as described. v p

10. In a regenerative reversing furnace, separately constructed gas and air up-takes, a gas box or chamber removably supported upon the upper end of the gas up-take, and an-air box or chamber removably supported on the upper end of the air up-take, said box or chambers having ports or twyers leading to the furnace chamber and constructed each in a plurality of detachable sections; substantially as described.

11. In a regenerative reversing furnace, having an up-take constructed separately from the body of the furnace and formed in detachable sections and a port removably supported upon the. upper section of the uptake and connecting the same with the furnace chamber; substantially as described.

12. In a regenerative reversing furnace having an up-take constructed separately from the body of the furnace and formed in detachable sections, each of said sections having an outer metallic shell and a refrac tory lining; substantially as described.

13. In a regenerative reversing furnace,

gas and air up-ta-kes, constructed separatel from the body of the furnace and of eac other, said up-takes having extensions below the regenerator connections, sald extensions havin discharge openings and means for norma 1y closing, said discharge openings;

substantially as described. v

14. In a regenerative reversible furnace,

an uptake having a removable to section,

a port or twyre eading from sai top section to the'furnace chamber, and a coaling box or casting applied to the outer surface movably supported upon the upper end of v the uptake and having a port leading to the furnace chamber, and a water coolln box or'casting inset into the outer wall 0 said box or chamber opposite the said port and extending throu hout the major portion of the height of said box or chamber.

In testimony whereof, I havehereunto set my hand.

. LUTHER L. KNOX. Witnesses:

H. M. CoRWIN,

GEO. H. PAItMELEE. 

